Effect of the hygienic status of poultry houses on performance and production.
D000818:Animals; D001419:Bacteria / Q000302:isolation & purification; D005260:Female; D006799:Housing, Animal / Q000592:standards*; D006920:Hygiene / Q000592:standards*; D008460:Meat; D010058:Oviposition / Q000502:physiology; D011200:Poultry / Q000502:physiology*